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YTECH SOLAR
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Industrial · DG Khan, Punjab

Hassan Flour Mill — 500 kW

Half a megawatt squeezed onto a constrained site by deliberately accepting a shading loss — and gaining 12,000 units a year by doing it.

Cost per watt
PKR 61/W

Total project cost including the 4% consultancy fee, divided by capacity

Extra annual yield
12,000 units

Modelled in PVsyst against a conventional row-spacing layout

Capacity
500 kW
Commissioned
December 2024

How it was done

The engineering decisions

  1. Why a flour mill is close to the ideal solar load

    A mill grinds during the day. That single fact does more for the economics than any equipment choice: the generating window and the consumption window are the same window, so almost every unit produced is consumed on site at full industrial tariff rather than exported at the buyback rate. When I am asked which businesses solar actually suits in Pakistan, mills, ice plants and cold stores are the honest answer, and this is why.

  2. Accepting a shading loss on purpose

    The site did not have room for 500 kW at conventional row spacing. The usual response is to tell the client the space only supports a smaller system. I modelled it in PVsyst instead, and took the other option: raise the ground cover ratio, tighten the row-to-row spacing, and accept that the rows will shade each other slightly in the early morning and late afternoon. That trade is only defensible if you quantify both sides of it, which is what the model is for. Tighter spacing cost a nominal shading loss and bought roughly 12,000 additional units a year, because the panels added generate far more across the day than the shading takes off at its edges. A denser array that loses a little is worth more than a sparse one that loses nothing.

  3. Equipment, and why the inverters are split four ways

    Canadian 695W N-Type TOPCon bifacial modules, four Huawei 115 kW inverters, a customised aluminium P1 rail structure, and 6mm double-XLPO DC cable. Four inverters rather than two larger units keeps a single inverter fault down to a quarter of plant output — on a mill that grinds to a schedule, the difference between losing a quarter of generation and half of it is the difference between a bad afternoon and a lost day. The bifacial modules earn their premium here: the mounting height and the roof surface give the rear face something to collect.

  4. What it cost, and what I was paid

    PKR 61 per watt, with the 4% consultancy fee already inside that figure. Wholesale procurement, original supplier invoices handed to the client, no margin taken on any of the equipment, and the fee invoiced once the system was commissioned and generating. The same terms as every project on this site — and the reason the per-watt number lands where it does is structural rather than clever: there is no hardware margin in it, because I do not sell hardware.

Specification

Why this equipment, on this site

Every line in the bill of materials was a decision with a reason. These are the ones worth explaining.

Modules

695W Canadian N-Type TOPCon bifacial

Bifacial earns its premium at this mounting height on a reflective industrial roof.

Inverters

4 × Huawei 115 kW

Split four ways so a single fault costs a quarter of plant output, not half.

Layout

Raised GCR, tightened row spacing

Modelled in PVsyst: a nominal shading loss traded for ~12,000 extra units a year.

Structure

Customised aluminium P1 rail

Fabricated to the site rather than ordered as a standard kit.

What I was paid

The same terms as every project on this site

Equipment bought at wholesale and invoiced to the client in the supplier's own name. No margin taken on any of it. My fee is 4% of total project cost, invoiced once the system is commissioned and generating.

The client holds every original invoice. They can check what a panel or an inverter costs in the Lahore market, and I expect them to — the model only works if the paperwork survives that.

Book a site assessment How I charge

Project record

Commissioned
1 Dec 2024
System type
On-grid
Structure
Customised aluminium P1 rail structure
Page updated
4 Aug 2026

Published with the client's written consent. Figures attributed to the client are marked as theirs.

The reasoning

Why this system was designed the way it was

The decisions on this project follow rules that apply to most sites in Pakistan. I have written them up in full — the sizing arithmetic under net billing, what payback really looks like against measured data, and how to check a quotation before you sign it.

More delivered work

Other projects

  • Simta Foods · Vehari Industrial

    1 MW
    PANELS
    594 × JA 715W N-Type Bifacial
    INVERTERS
    2 × SOLIS S5-GC125K 125 kW
    COMMISSIONED
    —
    MONTHLY SAVING
    PKR 1,900,000
    PAYBACK
    14 months
    MY FEE
    4%, on commissioning

    A megawatt on a food plant that runs its load through daylight — and 77 days of monitoring data, including the twelve days the inverters were off.

    Read the case study : Simta Foods, Vehari Industrial Estate — 1 MW

  • Hashim Textile · Lahore

    177 kW
    PANELS
    288 × Longi 615W N-Type Bifacial
    INVERTERS
    1 × Huawei SUN2000-115KTL 115 kW
    COMMISSIONED
    —
    MY FEE
    4%, on commissioning

    The clearest EPC+ comparison on this site: 177 kW delivered at PKR 56 a watt, against the PKR 62–72 the same job costs bought the conventional way.

    Read the case study : Hashim Textile, Lahore — 177 kW

All case studies